package com.app.bimo.commonbusiness.network;

import java.io.IOException;

import io.reactivex.Observer;
import okhttp3.MediaType;
import okhttp3.ResponseBody;
import okio.Buffer;
import okio.BufferedSource;
import okio.ForwardingSource;
import okio.Okio;
import okio.Source;

public class DownloadResponseBody extends ResponseBody {
    private ResponseBody responseBody;
    private Observer<Integer> observer;
    private BufferedSource bufferedSource;
    private long time;

    public DownloadResponseBody(ResponseBody responseBody, Observer<Integer> observer) {
        this.responseBody = responseBody;
        this.observer = observer;
        time = System.currentTimeMillis();
    }

    @Override
    public MediaType contentType() {
        return responseBody.contentType();
    }

    @Override
    public long contentLength() {
        return responseBody.contentLength();
    }

    @Override
    public BufferedSource source() {
        if (bufferedSource == null) {
            bufferedSource = Okio.buffer(source(responseBody.source()));
        }
        return bufferedSource;
    }

    private Source source(Source source) {
        return new ForwardingSource(source) {
            long totalBytesRead = 0L;

            @Override
            public long read(Buffer sink, long byteCount) throws IOException {
                final long bytesRead = super.read(sink, byteCount);
                // read() returns the number of bytes read, or -1 if this source is exhausted.
                totalBytesRead += bytesRead != -1 ? bytesRead : 0;
                int progress = (int) (totalBytesRead * 100 / responseBody.contentLength());
                if(System.currentTimeMillis()-time>500){
                    observer.onNext(progress);
                    time=System.currentTimeMillis();
                }
                return bytesRead;
            }
        };
    }
}
